RE: Further Questions re ASM and RAC

Hmmm, I haven't tried restarting the rawdevices services. That leads to
a question though, what will that do for the CRS installation is the OCR
and voting disk are on raw devices. I am worried that they will become
damaged. If they won't I will try that. Can you let me know.

Now, restart the ASM instance and try creating the diskgroup again
with appropriate disks.

-Rajeev

On 4/6/07, William Wagman <wjwagman_at_ucdavis.edu> wrote:

Greetings,

I am continuing to have difficulties getting ASM installed and
configured in my two-node RAC cluster, Oracle 10.2.0.3.0 on
RHEL3 and I
am certain there is some very simple little bit which I am
missing but I
just can't figure this out.
I encountered difficulties with the ASM installation a couple of
days
ago and it was suggested that I uninstall everything and start
all over
again with CRS which I did. I installed CRS and began the
installation
of ASM. I configured the ASM instance using the installer. When
it got
to the point of creating a disk group I accepted what I thought
was the
default 'DATA' and continued but the installer said such a group
already
existed. That surprised me because I thought I had removed all
traces by
uninstalling, deleteing and dd on disks. Nevertheless, the
install
seemed ok, it just couldn't mount the disk groups. I went ahead,
installed the 10.2.0.3.0 patch set and am now trying to get the
dis
groups mounted and here is what I find. First, there is a
diskgroup but
it is not mounted...
SQL> select * from v$asm_diskgroup;
GROUP_NUMBER NAME SECTOR_SIZE
BLOCK_SIZE
ALLOCATION_UNIT_SIZE STATE
------------ ------------------------------ -----------
----------
-------------------- -----------
TYPE TOTAL_MB FREE_MB REQUIRED_MIRROR_FREE_MB
USABLE_FILE_MB
OFFLINE_DISKS U
------ ---------- ---------- -----------------------
--------------
------------- -
COMPATIBILITY
------------------------------------------------------------
DATABASE_COMPATIBILITY
------------------------------------------------------------
0 DATA 512
4096
1048576 DISMOUNTED
0 0 0
0
0 N
0.0.0.0.0
0.0.0.0.0
I can't mount it...
SQL> alter diskgroup data mount;
alter diskgroup data mount
*
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15063: ASM discovered an insufficient number of disks for
diskgroup
"DATA"
I can't add a disk...
SQL> alter diskgroup data add disk '/dev/raw/raw3';
alter diskgroup data add disk '/dev/raw/raw3'
*
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15001: diskgroup "DATA" does not exist or is not mounted
Nor can I drop it...
SQL> drop diskgroup data including contents;
drop diskgroup data including contents
*
ERROR at line 1:
ORA-15039: diskgroup not dropped
ORA-15001: diskgroup "DATA" does not exist or is not mounted
So I tried to create a new disk group...
SQL> create diskgroup GROUP1 external redundancy
2 disk '/dev/raw/raw3';
create diskgroup GROUP1 external redundancy
*
ERROR at line 1:
ORA-15018: diskgroup cannot be created
ORA-15020: discovered duplicate ASM disk "DATA_0000"
But I don't see where that disk shows up...
SQL> select group_number,disk_number,name,path from v$asm_disk;
GROUP_NUMBER DISK_NUMBER NAME
------------ ----------- ------------------------------
PATH
------------------------------------------------------------------------
----------------------------
0 0
/dev/raw/raw4
0 1
/dev/raw/raw3
0 4
ORCL:VOL2
0 3
ORCL:VOL1
0 2
/dev/raw/raw2
The parameter asm_diskstring is not set but I don't know if that
has
anything to do with this. I'm completely stuck, I don't know
what else
to look at. I did configure the disks with oracleasm and I am
pretty
sure I did that part correctly. Sorry to keep bugging everyone
with this
but I'm completely stuck. I suspect it is something simple that
I am
just not seeing. If anyone can help me I would greatly